Component Comparison: NX3020NAKV,115 vs MCM3400A-TP
Quick verdict
For low-current, compact, logic-level switching applications operating up to 200mA, the NX3020NAKV,115 is the better choice due to its very small footprint and low gate charge. Conversely, for higher-current switching up to 5A with significant power dissipation, the MCM3400A-TP outperforms thanks to its low R_DS(on) and higher continuous current rating, making it suitable for power stages and load switches in more demanding circuits.
Spec comparison table
| Spec | NX3020NAKV,115 | MCM3400A-TP | Notes |
|---|---|---|---|
| Configuration | 2 N-Channel (Dual) | 2 N-Channel (Dual) | Equal |
| Max continuous drain current @ 25°C | 200 mA | 5 A | MCM3400A-TP supports 25× higher current, critical for power applications |
| Max continuous drain current @ 100°C | 120 mA | Not specified | NX3020NAKV,115 limited by lower current at elevated temperature |
| Max pulsed drain current | 800 mA | 20 A | MCM3400A-TP supports much higher pulsed currents |
| Max drain-source voltage (V_DS max) | 30 V | 30 V | Equal |
| Breakdown voltage (min) | 30 V | 30 V | Equal |
| Gate threshold voltage (V_GS(th)) typ | 2.0 V | 0.9 V | MCM3400A-TP turns on at lower gate voltage, easier to drive in low-voltage logic systems |
| Gate threshold voltage (max) | 2.5 V | 1.5 V | MCM3400A-TP advantage for low-voltage drive |
| Max gate-source voltage | ±20 V | ±12 V | NX3020NAKV,115 tolerates higher gate voltage swings |
| Max power dissipation @ 25°C | 375 mW | 1.4 W | MCM3400A-TP can handle almost 4× higher power dissipation |
| Drain-source on-resistance (R_DS(on)) typ | 1.5 Ω @ 100 mA, 10 V | 38 mΩ @ 5.8 A, 10 V | MCM3400A-TP has orders of magnitude lower R_DS(on), critical for conduction losses |
| Input capacitance (C_iss) max | 13 pF @ 10 V | 1155 pF @ 15 V | NX3020NAKV,115 has much lower input capacitance, reducing gate drive losses and switching losses |
| Gate charge (Q_g max) | 0.44 nC @ 4.5 V | Not specified | NX3020NAKV,115 has extremely low gate charge, making it easier to drive at high speed |
| Leakage current @ 150°C (typ) | 10 µA | Not specified | NX3020NAKV,115 leakage data provided; MCM3400A-TP not specified |
| Max junction temperature (T_j max) | 150 °C | 150 °C | Equal |
| Operating temperature range | -55°C to 150°C | -55°C to 150°C | Equal |
| Package | SOT-666 (SOT-563 variant) | DFN2020-6L (6-pin) | Different footprints and pinouts; impacts PCB layout and thermal performance |
| Thermal resistance (junction to ambient) | ~25 K/W (typ) | 89 °C/W (max) | NX3020NAKV,115 has lower thermal resistance; note MCM3400A-TP datasheet max value only |
| Max voltage gate-source | ±20 V | ±12 V | NX3020NAKV,115 supports higher gate voltage swings |
| Gate resistance (min) | Not specified | 1.7 Ω | MCM3400A-TP has internal gate resistance, which can slow switching |
| Diode forward voltage max | Not specified | 1 V | MCM3400A-TP body diode voltage drop specified, useful for synchronous rectifier applications |
| Max switching frequency | Not specified | 1 MHz (typ) | MCM3400A-TP supports higher switching speeds |
| Max drain current (absolute max) | 1.5 A | 10 A | MCM3400A-TP significantly higher absolute max current |
| Storage temperature range | -65°C to 150°C | -55°C to 150°C | NX3020NAKV,115 has wider storage temperature range |
| Warranty / liability | Limited warranty, liability limits | Not specified | NX3020NAKV,115 explicitly states liability limitations |
Design trade-offs
The NX3020NAKV,115 targets very low current, ultra-compact switching applications where PCB real estate and gate drive simplicity are paramount. Its extremely low input capacitance (13 pF) and gate charge (0.44 nC max) allow it to switch efficiently with minimal driver power, making it suitable for battery-powered or low-power logic-level control. However, its R_DS(on) at 1.5 Ω and continuous current rating of 200 mA severely limit its use in power applications or loads requiring significant current. The low power dissipation rating of 375 mW demands careful thermal management even at modest loads, but its small package and low thermal resistance (typ 25 K/W) help dissipate heat in compact designs.
The MCM3400A-TP is engineered for much higher currents, with a continuous drain current rating of 5 A and a pulsed rating up to 20 A. Its R_DS(on) is 38 mΩ typical, nearly 40× lower than the NX3020NAKV,115, dramatically reducing conduction losses at higher currents. This makes it suitable for DC-DC converters, load switches, or power multiplexing. The trade-off is a significantly larger input capacitance (1155 pF), which increases gate drive power and switching losses, and a higher gate resistance of 1.7 Ω which slows switching transitions. The package (DFN2020-6L) includes an exposed pad for improved thermal dissipation, but its thermal resistance is higher (89 °C/W max), so layout with a proper thermal pad is critical to maintain junction temperature within limits.
Gate drive requirements differ substantially. The NX3020NAKV,115 can be driven directly from low-current logic outputs with minimal delay, while the MCM3400A-TP requires a more robust gate driver capable of sourcing/sinking higher transient currents to charge/discharge its larger input capacitance. Additionally, the higher gate threshold voltage of the NX3020NAKV,115 (typ 2.0 V) vs. MCM3400A-TP (typ 0.9 V) means the latter is easier to fully turn on at lower gate voltages, fitting well with 3.3 V or 5 V gate drive rails.
From a layout perspective, the smaller SOT-666 package of the NX3020NAKV,115 is advantageous in space-constrained designs, while the MCM3400A-TP’s exposed pad DFN package necessitates careful PCB thermal design to realize its power dissipation capabilities. Cost-wise, the simpler, smaller NX3020NAKV,115 is likely less expensive in volume, but for applications demanding higher current and efficiency, the MCM3400A-TP’s performance justifies the added cost and complexity.
Use-case fit
Choose NX3020NAKV,115 when…
- You need a tiny dual MOSFET array for low current switching (<200 mA) in handheld or wearable devices.
- Your design is powered by low-current logic outputs and requires minimal gate drive power.
- PCB space is at a premium, and you cannot afford a larger DFN package.
- Operating voltages are low (up to 30 V) but currents remain minimal.
- Thermal dissipation is limited to under 375 mW, and ambient temperatures may reach up to 150°C.
Choose MCM3400A-TP when…
- Switching or load control requires up to 5 A continuous current with low conduction losses.
- Your design involves synchronous rectification or power stages needing low R_DS(on) MOSFETs.
- Gate drive circuitry can supply sufficient current to handle the large input capacitance and gate charge.
- PCB layout can accommodate a DFN package with exposed thermal pad and you have provisions for thermal management.
- Switching frequencies up to 1 MHz are desired for high-efficiency DC-DC converters or power management ICs.
Drop-in compatibility
These two devices are not pin-compatible or footprint-compatible. The NX3020NAKV,115 comes in a SOT-666 (SOT-563 variant) package with very small dimensions (~0.375 mm x 0.6 mm per MOSFET), while the MCM3400A-TP uses a 6-pin DFN2020-6L package with an exposed thermal pad. Their pinouts and thermal requirements differ significantly, so substituting one for the other requires a PCB redesign and possibly gate drive circuitry